Improvement in bronzing-machines



, HESTN-- N nBronzng Machnes PatentedAug25,1874. N o.l5y4,48`01.-

ms GRAPHIC co. PHoTo -uTH4 :s :(+1 PARK Puce, NX,

UNITED 7i121rAl'rEs DAviD HEsToN, or PHILADELPHIA,

' PENNSYLVANIA, ASSIGNOR TO HIM- SELF AND ROBERT S. MENAMIN, OF SAME PLAGE.

, awiPaovlilvii:ui''IN` BRbNZlNe-MAGHINS.

. To all 'whom it may concern:

Be it known that I, DAVID RESTON, of Philadelphia, Pennsylvania, have invented certain Improvements in Bronzing-Maehines, of which the following is a-specication:

My invention relates to improvements in the bronzing-machine for which Letters Patent No. 150,037, were granted to myself and ROBERT S. MENAMIN, as my assignees, on the 21st day of April, 1874; and the objects of my said improvements are to facilitate the distribution of the bronze onto the paper to prevent the bronze from accumulating on the inner surface of the endless conveyer or apron,

to prevent the paper from adhering to the outer surface of the latter, and to facilitate the attachment of the paper to and its removal'from the said apron, which objects I attain by constructing the machine as I will now proceed to describe, reference being had to the accompanying drawing, in which- Figure 1 is a sectional elevation of the improved machine; Fig. 2, a transverse section on the line l 2, Fig. 1; Fig. 3, a perspective view of a portion of the endless apron; and Figs. 4 and 5, detached views of parts of the machine.

The frame of the machine consists of a box, A, within which is a rotating pad, B, for distributing the bronze-powder onto the sheets of paper carried by the endless apron D, the latter passing around rollers G and Gr', and the superfluous bronze being removed from the paper by revolving brushes H H, arranged beneath the apron, and over a drawer or oth er receptacle, I, at the bottom ofthe box. In these respects the machine is substantially the same as in my aforesaid patent of April 21, 1874. The bronze is discharged onto the rotating pad B,from a box, AJ having a curved and perforated bottom, c, through which the powder is gradually forced by abrush, b, secured toa shaft, d, to which a slow oscillating or vibrating movement is imparted. I have found that the bronze can 'be distributed much l more evenly by this arrangement than by the surface of the apron D in sufficient quanti- 4 application inea 1 ties to interfere with the operation of the machine, I extend a brush, K, transversely across ,the said apron, in the manner shown' in Figs. lil and 2, and arrange a ldouble inclined chute,

e, beneath the said brush, by which the sweepings are conducted 0E to the opposite sides of the machine, and prevented from falling upon the lower portion of the apron. l

In ordinary machines of this class, each sheet of paper is attached at one end to the endless apron byjaspring-clip, which is opened at the proper moment, in order to release the sheet. The action of the brushes upon the paper, however, causes the latter to adhere to the smooth surface of the apron, which interferes materially with the successful operation of the machine. This objection I have effectuallyr overcome by simply grooving the surface of the apron in the manner plainly shown in Fig. 3, or the same result may be attained by grooving the surface ofthe said so as to form a series of projections, or by otherwise roughening its surface. Various forms of clips may be used for retaining they paper upon the apron, while it is being subjected to the bronzing process, but I prefer the arrangement illustrated in the drawing, which I will now proceed to describe.

A Each clip consists of two bars or plates,M and M', the former of which extends across the outer, and the latter across the inner side ofthe apron, at points directly opposite each other. The plate M is permanently secured to the apron, and should be flush with its inner side, but the plate M, which is the clip proper, is held against the surface of the apron by the action of springs f, wound upon pins g, secured to the said plate M, and extending through both the apron and the plate M. The opposite ends h h and 11 t of both of the plates M and M', extend beyond the edges of the apron, as shown in Fig. 3, yso that when the said plates are carried by the movement of the belt past bars P P, secured to the frame of the machine, their projecting ends shall pass over and under the said bars, and this, owing to the peculiar shape of the latter, which are of the nature of fixed cams, will have the eect of elevating the clip M above apron transversely as Well as longitudinally,

theA surface, of the apron, in order to .permity the introduction of the edge of av sheet of paper beneath it, the paper being tightly clamped to the apron by the action of the springs, as soon as the clip has passed the bars P. The paper after having been subjected to the bronzing process'is carried by the clip to a position directly over an inclined receptacle, It, when the ends h h of the said clip are caused to pass over cam-like projections k, (see Fig. 1,) and are thus lifted suiciently to withdraw the clip from the apron, andl release the paper.

As the apron is apt to become loose after aV period of Wear, I provide one or both of its rollers G with sliding bearings m, which can be adjusted and retained after adjustment by a screw, m, in a manner Which Will be readily understood on reference to Fig. 4.

The brushes are also provided with adjustable bearings p, Fig. 5, which permit them to be set up toward the apron, as they become worn away.

I claim as my invention- 1. The combination, in a bronzing-machine,

4. The combination, substantially as del scribed, of the endless apron D, its springclips M M', and the fixed bars or cams l? P, adjacent to the edges of the said apron.

5. The combination of the endless apron D, the spring-clips M M', and the xed cams or inclines la, all as and for the purpose specified.

In testimony whereof lI have signed my Aname to this specification in the presence of 'two subscribing Witnesses.

. DAVID HESTON.

Witnesses:

WM. A. STEEL, HARRY SMITH. 

